WO1993012597A1 - Spread-spectrum data publishing system - Google Patents

Spread-spectrum data publishing system Download PDF

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Publication number
WO1993012597A1
WO1993012597A1 PCT/US1992/010912 US9210912W WO9312597A1 WO 1993012597 A1 WO1993012597 A1 WO 1993012597A1 US 9210912 W US9210912 W US 9210912W WO 9312597 A1 WO9312597 A1 WO 9312597A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
communication channel
spread
channel
shared
Prior art date
Application number
PCT/US1992/010912
Other languages
French (fr)
Inventor
Douglas G. Smith
Original Assignee
Omnipoint Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Omnipoint Corporation filed Critical Omnipoint Corporation
Priority to EP93901206A priority Critical patent/EP0617864B1/en
Priority to DE69232442T priority patent/DE69232442T2/en
Priority to AT93901206T priority patent/ATE213887T1/en
Priority to CA002125969A priority patent/CA2125969C/en
Priority to JP50554593A priority patent/JP3766434B2/en
Publication of WO1993012597A1 publication Critical patent/WO1993012597A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • H04B7/2637—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] for logical channel control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/42—Arrangements for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
    • H04H60/07—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information characterised by processes or methods for the generation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/76—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet
    • H04H60/81—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet characterised by the transmission system itself
    • H04H60/90—Wireless transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
    • H04H20/30—Arrangements for simultaneous broadcast of plural pieces of information by a single channel
    • H04H20/31—Arrangements for simultaneous broadcast of plural pieces of information by a single channel using in-band signals, e.g. subsonic or cue signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/71—Wireless systems
    • H04H20/74—Wireless systems of satellite networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/76—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet
    • H04H60/81—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet characterised by the transmission system itself
    • H04H60/90—Wireless transmission systems
    • H04H60/91—Mobile communication networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information

Definitions

  • Data publishing is the process of transmitting data to recipients by means of electronic communication channels, such as broadcast or related communication methods.
  • One motive for data publishing is that it may be easier or less expensive to transmit data to recipients by means of broadcast than it would be to write that data onto physical media (such as paper or magnetic disks or tapes) and carry the physical media to them.
  • Another motive is that the marginal cost of publishing the same data to an additional recipient may be comparatively small.
  • Data publishing may be particularly advantageous when the data to be published are voluminous, rapidly changing, or must be delivered within a short time to be useful.
  • a classic example of such data is stock-market trading data, although there are many other cases where data publishing would be advantageous.
  • One problem which has arisen in the art is the lack of sufficient broadcast infrastructure for data publishing.
  • the data source 101 may originate (or format) a variety of different types of data to be published. These may include: text, graphics, digitized voice, digitized images or moving video, or mixed media; financial, news and weather data, including digitized photos and weather maps; airline and rail scheduling data; updates for in-store retail displays, including high-resolution graphic advertisements and animation; credit and credit card data for in-store approval and verification; encyclopedia or other database contents, including chemical, legal, medical, and pharmacological databases, and advertising and telephone listings; high-quality telecopier images and other print images; and updates for documentation manuals, including airline, automotive and computer manuals.
  • data to be published may include: text, graphics, digitized voice, digitized images or moving video, or mixed media; financial, news and weather data, including digitized photos and weather maps; airline and rail scheduling data; updates for in-store retail displays, including high-resolution graphic advertisements and animation; credit and credit card data for in-store approval and verification; encyclopedia or other database contents, including chemical, legal

Abstract

A system for publishing data (409) on shared broadcast channels using spread-spectrum techniques, which may comprise a spread-spectrum encoder (405) capable of receiving data and placing it in a spread-spectrum signal format (407) and a transmitter (406) operating on a shared communication channel or frequency band, such as might be allocated to terrestrial point-to-point or broadcast communications. The shared communication channel may comprise a cellular system, in which data (409) may be transmitted (406) using spread-spectrum techniques using the transmitters (406) and repeaters of the cellular system simultaneously with voice and other transmissions associated with the cellular system. A subscriber station may be capable of receiving using a plurality of different communication channels or frequency bands, such as a first receiver capable of cellular reception and a second receiver capable of satellite reception, at least one of which uses spread-spectrum techniques. The subscriber station may also comprise a transmitter using at least one communication channel or frequency band, so that the subscriber station may receive data or other transmissions using one channel and may request further data or other transmissions using a second channel.

Description

DESCRIPTION
Spread-Spectrum Data Publishing System
Background Of The Invention
1. Field of the Invention
This invention relates to a system for publishing data by broadcast or related technology. More specifically, this invention relates to a system for publishing data on shared channels using spread-spectrum techniques.
2. Description of Related Art
Data publishing is the process of transmitting data to recipients by means of electronic communication channels, such as broadcast or related communication methods. One motive for data publishing is that it may be easier or less expensive to transmit data to recipients by means of broadcast than it would be to write that data onto physical media (such as paper or magnetic disks or tapes) and carry the physical media to them. Another motive is that the marginal cost of publishing the same data to an additional recipient may be comparatively small. Data publishing may be particularly advantageous when the data to be published are voluminous, rapidly changing, or must be delivered within a short time to be useful. A classic example of such data is stock-market trading data, although there are many other cases where data publishing would be advantageous. One problem which has arisen in the art is the lack of sufficient broadcast infrastructure for data publishing. There are few if any broadcast towers, repeaters, or receivers for use with data publishing, so it has been generally necessary to use infrastructure which is already associated with another form of communication. Hence the use of telephone, television, radio and satellite systems noted above. Accordingly, it would be advantageous to provide a method of data publishing which did not require construction of large amounts of additional infrastructure.
Another problem which has arisen in the art is that it may be difficult to obtain sufficient bandwidth, at reasonable cost and without excessive difficulty, to publish the data. Lack of bandwidth naturally either reduces the amount of data which can be published, or increases the amount of time which is required to publish the data to recipients.
One method of the prior art is to make use of spare bandwidth from an extant communication system. Examples include telephone (using data-over-voice) , television (using vertical blanking intervals) , and radio (using FM sidebands) systems. While this method achieves a limited degree of success, it has been subject to the drawback that it has not been able to deliver bandwidth to support publishing of large amounts of data. For example, while television systems have a great deal of broadcast bandwidth, the amount of bandwidth for data publishing available by means of the vertical blanking interval is relatively limited. Another problem is that this prior art method does not generally provide national coverage. Another method of the prior art is to allocate separate frequency bands in which to publish the data. Examples of this method include satellite systems with dedicated channels. While this method is able to deliver a greater amount of bandwidth for data publishing, it has been subject to the drawback that allocation of separate frequency bands for data publishing may generally require proceedings before the FCC or other government agencies.
Another method of the prior art is to use leased lines or other telephone lines to publish the data serially to multiple receiving sites. While this method is able to deliver the data* to receiving sites, it has been subject to the drawback that it requires a great deal of money in leased line charges or telephone charges, and therefore may not be economical.
Accordingly, it would be advantageous to provide a method of data publishing which allowed easier access to sufficient bandwidth for data publishing.
Summary Of The Invention
The invention provides a system for publishing data on shared broadcast channels using spread-spectrum techniques. The system may comprise a spread-spectrum encoder capable of receiving data and placing it in a spread-spectrum signal format and a transmitter operating on a shared communication channel or frequency band, such as might be allocated to terrestrial point-to-point or broadcast communications. In a preferred embodiment, the shared communication channel may comprise a cellular system, in which data may be transmitted using spread- spectrum techniques using the transmitters and repeaters of the cellular system simultaneously with voice and other transmissions associated with the cellular system. In a preferred embodiment, a subscriber station may be capable of receiving using a plurality of different communication channels or frequency bands, such as a first receiver capable of cellular reception and a second receiver capable of satellite reception, at least one of which uses spread-spectrum techniques. The subscriber station may also comprise a transmitter using at least one communication channel or frequency band, so that the subscriber station may receive data or other transmissions using one channel and may request further data or other transmissions using a second channel. For example, the subscriber station may comprise a cellular transmitter and receiver, and a satellite receiver.
Brief Description Of The Drawings
Figure 1 shows a block diagram of a system for data publishing. Figure 2 shows a block diagram of a cellular system communication channel in a system for data publishing.
Figure 3 shows a block diagram of a subscriber station. Figure 4 shows a block diagram of a transmitter station.
Description Of The Preferred Embodiment
Figure 1 shows a block diagram of a system for data publishing. A system for data publishing may comprise a data source 101, a transmitter station 102, a communication channel 103, and a subscriber station 104. The data source 101 may originate the data to be published (or may format it for publication) . The transmitter station 102 may receive the data and place it in a spread-spectrum signal format for transmission over the communication channel 103. The communication channel 103 may couple the data (in a spread-spectrum signal format) to one or more subscriber stations 104. The subscriber stations 104 may receive the data and decode it from the spread-spectrum forma .
In a preferred embodiment, the data source 101 may originate (or format) a variety of different types of data to be published. These may include: text, graphics, digitized voice, digitized images or moving video, or mixed media; financial, news and weather data, including digitized photos and weather maps; airline and rail scheduling data; updates for in-store retail displays, including high-resolution graphic advertisements and animation; credit and credit card data for in-store approval and verification; encyclopedia or other database contents, including chemical, legal, medical, and pharmacological databases, and advertising and telephone listings; high-quality telecopier images and other print images; and updates for documentation manuals, including airline, automotive and computer manuals. In a preferred embodiment, the subscriber stations 104 may each comprise a multitasking processor which may perform communication tasks in parallel with other tasks, and which may be coupled to a LAN (local area network) or WAN (wide area network) for retransmitting data to other cooperating processors.
In a preferred embodiment, the communication channel 103 may comprise a satellite system 105, having an uplink station 106, a satellite and transponder 107 (preferably with a wide area footprint), and a downlink station 108, as is well known in the art of satellite communication. The uplink station 106 may be coupled to the transmitter station 102; the downlink station 108 may be coupled to the subscriber station 104 and may comprise an indoor mountable one-foot antenna, as is well known in the art of satellite communication.
In a preferred embodiment, the transmitter station 102 and the subscriber station 104 may comprise inventions disclosed in U.S. Patents 5,016,255 and 5,022,047, and in application Serial No. 07/556,147 filed July 23, 1990, 07/562,867 filed August 6, 1990, 07/600,772 filed October 23, 1990, 07/698,450 filed May 10, 1991, 07/698,458 filed May 10, 1991, and 07/698,694 filed May 13, 1991, all of which are hereby incorporated by reference as if fully set forth herein, and the spread-spectrum signal format may comprise signal formats disclosed therein.
Figure 2 shows a block diagram of a cellular system communication channel in a system for data publishing.
In a preferred embodiment, the communication channel 103 may comprise a shared communication channel or frequency band, such as might be allocated to terrestrial point-to-point or broadcast communications. In particular, in a preferred embodiment, the communication channel 103 may comprise a cellular system 109, with a set of base stations 110 and a set of cells 111. In the cellular system 201, the data to be published may be transmitted using the frequency bands allocated to the cellular system 201, from the transmitter station 102 to a transmitter base station 202, to a receiver base station 202 (possibly by means of a set of repeaters 112) , to a user station 113. In a preferred embodiment, the transmitter station 102 may be collocated with the transmitter base station 202, may be coupled thereto by means of cabling, and may even share the same antenna. Return messages may be transmitted from the user station 205 to the transmitter station 102 in like manner. Because the data to be published is transmitted in a spread-spectrum signal format, it may use the same frequency bands allocated to the cellular system 201 simultaneously with other transmissions associated with the cellular system 201 and without interfering with those other transmissions. Moreover, the data to be published (in its spread-spectrum signal format) may be routed in the cellular system 201 and transmitted from base station 202 to base station 202 without loss of data and without substantial modification of the cellular system 201. In a preferred embodiment, the cellular system 201 may comprise inventions disclosed in application Serial No. 07/682,050 filed April 8, 1991, 07/709,712 filed June 3, 1991 and 07/712,239 filed June 7, 1991, all of which are hereby incorporated by reference as if fully set forth herein.
Figure 3 shows a block diagram of a subscriber station.
In a preferred embodiment, the subscriber station 104 may comprise a first receiver 301 operating on a first communication channel 103 and a second receiver 301 operating on a second communication channel 103, at least one of which uses spread-spectrum techniques. For example, in a preferred embodiment, the first communication channel 103 may comprise the cellular system 201 shown in figure 2, and the second communication channel 103 may comprise the satellite system 105 shown in figure 1. In a preferred embodiment, the subscriber station 104 may also comprise a subscriber transmitter 302 operating on a third communication channel 103, and the transmitter station 102 may comprise a receiver operating on that third communication channel 103. For example, in a preferred embodiment, the third communication channel 103 may also comprise the cellular system 201 shown in figure 2 (i.e., the third communication channel 103 is the same as the first communication channel 103) , so that the cellular system 201 may be used for two-way communication between the transmitter station 102 and the subscriber station 104.
The subscriber station 104 may thus receive data to be published (as well as other information described with reference to figure 1) , and respond, by means of the cellular system 201. The response may comprise a request for further data or other transmissions by means of the satellite system 105, and the transmitter station 102 may answer that request with further data transmitted by means of the satellite system 105.
Figure 4 shows a block diagram of a transmitter station.
The transmitter station 102 may comprise a formatting module 401 for receiving data from the data source 101, a data compression module 402, an error correction module 403, a message encoding module 404, a spread-spectrum encoding module 405, and a transmitting antenna 406.
In a preferred embodiment, the formatting module 401 may comprise a buffer 407 for receiving data from the data source, and may generate a message signal 408 comprising the data to be published 409 and message packaging data 410, as is well known in the art of message transmission protocols. For example, in a preferred embodiment, messages may be addressed to individual subscriber stations 104 by indicating a 32-bit individual address in the message packaging data 410. In a preferred embodiment, the formatting module 401 may format data for a plurality of data channels, may multiplex the data to be published on each data channel, and may divide each data channel into up to 256 logical subchannels.
In combination with a request by the subscriber station 104 for particular data or data services, the formatting module 401 may also generate usage data and related statistical data by review of the buffer 407 and the message packaging data 410. In a preferred embodiment, the formatting module 401 may generate usage data which correlates each subscriber station 104 with the data to be decoded by that subscriber station 104, and that usage data may be used to compute charges for subscribers stations 104 and to rate demand for particular data or data services. In a preferred embodiment, the formatting module 401 may format text data in ASCII format, and may format image data in bitmap format at a resolution of 300 x 300 dots per inch, or more preferably, 400 x 400 dots per inch.
The data compression module 402 may encode the data to be published into a more compact form, as is well known in the art of data compression. In a preferred embodiment, the data compression module may use a group
III data compression technique for data which is designated to be output to a telecopier. In a preferred embodiment, data compression module may use an ASCII compression technique for text data which is keyword searchable in compressed form, and may use a compression technique for image data which is automatically scaled for output to lower resolution printers or for display on graphics monitor. Data compression techniques which do not use "alphabet extension" are preferred.
The error correction module 403 may encode the data to be published by adding error detection and correction information, as is well known in the art of error detection and correction. In a preferred embodiment, the error correction module 403 may use a forward error correction technique which adapts the degree of error detection and correction information to the type of data to be published, and which further adapts the degree of error detection and correction information to real-time error characteristics of the communication channel 103. The message encoding module 404 may encode the data to be published to preserve its security against unauthorized reception. In a preferred embodiment, the message encoding module 404 may use a nonlinear cipher feedback shift register technique which processes data at about 10 kilobytes per second. In a preferred embodiment, data to be published may be divided into "files" and each file encoded with a file-specific key, and when received at the subscriber station, re-encoded after receipt with a station-specific or device-specific key. In a preferred embodiment, the message encoding module 404 may comprise a hardware encoding device which encodes one byte at a time.
Alternative Embodiments
While preferred embodiments are disclosed herein, many variations are possible which remain within the concept and scope of the invention, and these variations would become clear to one of ordinary skill in the art after perusal of the specification, drawings and claims herein. In particular, a preferred embodiment of the invention is shown in which data to be published is broadcast by means of a satellite link from an transmitting station to a subscriber station. However, it would be clear to one of ordinary skill in the art, after perusal of the specification, drawings and claims herein, that the invention is also applicable to many different forms of transmission and media for broadcast. These many different forms of transmission and media for broadcast, would be workable, and are within the scope and spirit of the invention. For example, it would be clear to one of ordinary skill in the art that the invention would be equally workable with cable TV media, without essential change.

Claims

Claims
1. A system for publishing data on shared broadcast channels using spread-spectrum techniques, comprising a spread-spectrum encoder capable of receiving data to be published and generating a signal including a representation of said data in a spread-spectrum format; and a transmitter coupled to said encoder for operating on a shared terrestrial communication channel.
2. A system as in claim 1, wherein said communication channel comprises a broadcast communication channel or a point-to-point communication channel.
3. A system as in claim 1, wherein said communication channel comprises a predetermined set of frequencies.
4. A system as in claim 1, wherein said communication channel comprises at least one frequency between about 1850 and about 2200 megahertz.
5. A system as in claim 1, wherein said communication channel comprises a cellular system.
6. A system as in claim 1, wherein said communication channel comprises a cellular system, and wherein said communication channel is shared with at least one further transmission associated with, said cellular system.
7. A system as in claim 1, wherein said communication channel is shared with at least one nondata transmission.
8. A system as in claim 1, wherein said communication channel is shared with at least one nondigital transmission.
9. A system as in claim 1, wherein said communication channel is shared with at least one voice transmission.
10. A system as in claim 1, comprising a subscriber station capable of receiving using a plurality of different communication channels.
11. A system as in claim 1, comprising a subscriber station capable of receiving using a plurality of different communication channels, said subscriber station comprising a first receiver capable of cellular reception and a second receiver capable of satellite reception, at least one of said first and second receivers using spread- spectrum techniques.
12. A system as in claim 1, comprising a subscriber station having means for transmitting information; said system comprising means for receiving said information.
13. A system as in claim 1, comprising a subscriber station having means for transmitting information; said system comprising means for receiving said information; wherein said means for transmitting information uses said shared terrestrial communication channel.
14. A system as in claim 1, comprising a subscriber station having means for receiving data on a first and a second channel, and means for transmitting a request to receive data on said second channel in response to data received on said first channel; said system comprising means for receiving said request and for transmitting data on said second channel in response thereto.
15. A system as in claim 1, comprising a subscriber station having a cellular transmitter and receiver, and a satellite receiver.
16. A method of publishing data on shared broadcast channels using spread-spectrum techniques, comprising the steps of receiving data to be published; generating a signal including a representation of said data in a spread-spectrum format; and transmitting said signal on a shared terrestrial communication channel.
17. A method as in claim 16, wherein said communication channel comprises a broadcast communication channel or a point-to-point communication channel.
18. A method as in claim 16, wherein said communication channel comprises a predetermined set of frequencies.
19. A method as in claim 16, wherein said communication channel comprises at least one frequency between about 1850 and about 2200 megahertz.
20. A method as in claim 16, wherein said communication channel comprises a cellular system.
21. A method as in claim 16, wherein said communication channel comprises a cellular system, and wherein said communication channel is shared with at least one further transmission associated with said cellular system.
22. A method as in claim 16, wherein said communication channel is shared with at least one nondata transmission.
23. A method as in claim 16, wherein said communication channel is shared with at least one nondigital transmission.
24. A method as in claim 16, wherein said communication channel is shared with at least one voice t ansmission.
25. A method as in claim 16, comprising the step of receiving data at a subscriber station using a plurality of different communication channels.
26. A method as in claim 16, comprising the step of receiving data at a subscriber station using a first receiver capable of cellular reception and a second receiver capable of satellite reception, at least one of said first and second receivers using spread-spectrum techniques.
27. A method as in claim 16, comprising the steps of transmitting information from a subscriber station; and receiving said information.
28. A method as in claim 16, comprising the steps of transmitting information from a subscriber station; and receiving said information; wherein said step of transmitting information uses said shared terrestrial communication channel.
29. A method as in claim 16, comprising the steps of receiving data at a subscriber station on a first and a second channel; transmitting a request to receive data on said second channel in response to data received on said first channel; and receiving said request and transmitting data on said second channel in response thereto.
30. In a system for publishing data on shared terrestrial communication channels using spread-spectrum techniques, a subscriber station capable of receiving using a plurality of different communication channels.
31. A system as in claim 30, wherein said plurality of different communication channels comprises a first cellular channel and a second satellite channel, at least one of said first and second channels using spread- spectrum techniques.
32. A system as in claim 30, wherein said subscriber station comprises a transmitter for operating on a shared terrestrial communication channel.
33. A system as in claim 30, wherein said subscriber station comprises means for receiving data on a first and a second channel; and means for transmitting a request to receive data on said second channel in response to data received on said first channel.
34. A system as in claim 30, wherein said subscriber station comprises a cellular transmitter and receiver, and a satellite receiver.
35. In a method of publishing data on shared terrestrial communication channels using spread-spectrum techniques, the step of receiving data at a subscriber station using a plurality of different communication channels.
36. A method as in claim 35, wherein said plurality of different communication channels comprises a first cellular channel and a second satellite channel, at least one of said first and second channels using spread- spectrum techniques.
37. A method as in claim 35, comprising the step of transmitting information from said subscriber station on a shared terrestrial communication channel.
38. A method as in claim 35, comprising the steps of receiving data at said subscriber station on a first and a second channel; and transmitting a request to receive data on said second channel in response to data received on said first channel.
39. In a system for publishing data on shared broadcast channels using spread-spectrum techniques, a powered electromagnetic signal comprising a representation in a spread-spectrum format of data to be published, spread over a frequency band corresponding to a shared terrestrial communication channel, overlaid with at least one further transmission associated with said shared terrestrial communication channel.
40. In a system for publishing data on shared broadcast channels using spread-spectrum techniques, a powered electromagnetic signal comprising a representation in a spread-spectrum format of data to be published, spread over a frequency band corresponding to a cellular communication channel, overlaid with at least one further transmission associated with said cellular system.
41. In a system for publishing data on shared broadcast channels using spread-spectrum techniques, a powered electromagnetic signal comprising a representation in a spread-spectrum format of data to be published, spread over a frequency band comprising at least one frequency between about 1850 and about 2200 megahertz.
PCT/US1992/010912 1991-12-16 1992-12-15 Spread-spectrum data publishing system WO1993012597A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP93901206A EP0617864B1 (en) 1991-12-16 1992-12-15 Spread-spectrum data publishing system
DE69232442T DE69232442T2 (en) 1991-12-16 1992-12-15 Spread spectrum DATA RELEASE SYSTEM
AT93901206T ATE213887T1 (en) 1991-12-16 1992-12-15 SPREAD SPECTRUM DATA PUBLISHING SYSTEM
CA002125969A CA2125969C (en) 1991-12-16 1992-12-15 Spread-spectrum data publishing system
JP50554593A JP3766434B2 (en) 1991-12-16 1992-12-15 Spread spectrum data transmission system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US80919491A 1991-12-16 1991-12-16
US07/809,194 1991-12-16

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WO1993012597A1 true WO1993012597A1 (en) 1993-06-24

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US (2) US5742638A (en)
EP (1) EP0617864B1 (en)
JP (4) JP3766434B2 (en)
AT (1) ATE213887T1 (en)
AU (1) AU3324893A (en)
CA (1) CA2125969C (en)
DE (1) DE69232442T2 (en)
WO (1) WO1993012597A1 (en)

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* Cited by examiner, † Cited by third party
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KR970703660A (en) * 1994-07-23 1997-07-03 랄프 홀거 베렌스; 게오르그 뮐러 Single point: multi-points radio link system
US8315659B2 (en) 1997-08-15 2012-11-20 Qualcomm Incorporated Method and apparatus for providing broadcast messages in a communications network

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0617864B1 (en) 1991-12-16 2002-02-27 XIRCOM Wireless, Inc. Spread-spectrum data publishing system
US5960344A (en) 1993-12-20 1999-09-28 Norand Corporation Local area network having multiple channel wireless access
US5915207A (en) 1996-01-22 1999-06-22 Hughes Electronics Corporation Mobile and wireless information dissemination architecture and protocols
US6697415B1 (en) 1996-06-03 2004-02-24 Broadcom Corporation Spread spectrum transceiver module utilizing multiple mode transmission
US6463089B1 (en) * 1998-08-19 2002-10-08 Interair Wireless, Inc. Hybrid spread spectrum method and system for wirelessly transmitting and receiving wideband digital data
US7228429B2 (en) * 2001-09-21 2007-06-05 E-Watch Multimedia network appliances for security and surveillance applications
US6920309B1 (en) 1999-03-18 2005-07-19 The Directv Group, Inc. User positioning technique for multi-platform communication system
US7215954B1 (en) 1999-03-18 2007-05-08 The Directv Group, Inc. Resource allocation method for multi-platform communication system
JP2001285220A (en) * 2000-03-30 2001-10-12 Matsushita Electric Ind Co Ltd Program control information generating device
US7027769B1 (en) 2000-03-31 2006-04-11 The Directv Group, Inc. GEO stationary communications system with minimal delay
US7302224B2 (en) * 2000-05-03 2007-11-27 The Directv Group, Inc. Communication system for rebroadcasting electronic content within local area network
US7450969B1 (en) 2000-08-28 2008-11-11 Wideray, Inc. Two radio interface for mobile communication device for electronic commerce
US7103317B2 (en) 2000-12-12 2006-09-05 The Directv Group, Inc. Communication system using multiple link terminals for aircraft
US6952580B2 (en) 2000-12-12 2005-10-04 The Directv Group, Inc. Multiple link internet protocol mobile communications system and method therefor
US7187949B2 (en) 2001-01-19 2007-03-06 The Directv Group, Inc. Multiple basestation communication system having adaptive antennas
US7809403B2 (en) * 2001-01-19 2010-10-05 The Directv Group, Inc. Stratospheric platforms communication system using adaptive antennas
US8396513B2 (en) 2001-01-19 2013-03-12 The Directv Group, Inc. Communication system for mobile users using adaptive antenna
US20020188656A1 (en) * 2001-05-15 2002-12-12 Charles Patton Combining specialized, spatially distinguished, point to point communications with other wireless networking communications to provide networking configuration in classroom-like settings
US20030112883A1 (en) * 2001-12-13 2003-06-19 Ihrie David Wayne Method and apparatus for bi-directional communication in systems broadcasting multi-carrier signals
US7003040B2 (en) * 2002-09-24 2006-02-21 Lg Electronics Inc. System and method for multiplexing media information over a network using reduced communications resources and prior knowledge/experience of a called or calling party
US7203488B2 (en) * 2002-11-08 2007-04-10 Louis Luneau Flexible software radio transceiver
US7397848B2 (en) 2003-04-09 2008-07-08 Rambus Inc. Partial response receiver
US7092472B2 (en) * 2003-09-16 2006-08-15 Rambus Inc. Data-level clock recovery
US7126378B2 (en) 2003-12-17 2006-10-24 Rambus, Inc. High speed signaling system with adaptive transmit pre-emphasis
US7167694B2 (en) 2003-04-14 2007-01-23 Silicon Laboratories Inc. Integrated multi-tuner satellite receiver architecture and associated method
US20050132415A1 (en) * 2003-12-11 2005-06-16 Hillis W. D. Spatial-to-temporal data translation and transmission
US7644183B2 (en) * 2003-12-11 2010-01-05 Searete, Llc Accelerated reception of spatial-to-temporal translated data
US20050132149A1 (en) * 2003-12-11 2005-06-16 W. Daniel Hillis Spatial-to-temporal data translation and scheduling and control
US20050131863A1 (en) * 2003-12-11 2005-06-16 W. Daniel Hillis Reception of spatial-to-temporal translated data
US7233164B2 (en) * 2003-12-17 2007-06-19 Rambus Inc. Offset cancellation in a multi-level signaling system
US7392017B2 (en) * 2005-06-30 2008-06-24 Google Inc. Assessing wireless network quality

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4837786A (en) * 1986-08-07 1989-06-06 Comstream Corporation Technique for mitigating rain fading in a satellite communications system using quadrature phase shift keying
US5073900A (en) * 1990-03-19 1991-12-17 Mallinckrodt Albert J Integrated cellular communications system

Family Cites Families (148)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US27738A (en) * 1860-04-03 Railroad axle-box
US4247942A (en) * 1961-03-01 1981-01-27 Ford Aerospace & Communications Corp. Jam resistant communication system
USRE27738E (en) 1971-12-22 1973-08-21 Takamichi honma
FR2261653B1 (en) * 1974-02-15 1978-01-06 Thomson Csf
US3934203A (en) * 1974-05-24 1976-01-20 The United States Of America As Represented By The Secretary Of The Navy Spread spectrum modem
US4653069A (en) * 1975-11-06 1987-03-24 General Electric Company Spread spectrum correlation receiver
US3978436A (en) * 1975-11-10 1976-08-31 Rca Corporation Surface acoustic wave device and method of making same
US4217563A (en) * 1975-12-22 1980-08-12 Westinghouse Electric Corp. Surface wave phase correlator and monopulse radar system employing the same
US4021898A (en) * 1976-05-20 1977-05-10 Timex Corporation Method of adjusting the frequency of vibration of piezoelectric resonators
US4163944A (en) * 1976-12-22 1979-08-07 Ncr Corporation Compensation circuit for an electrical signal mixer
US4100498A (en) * 1977-06-20 1978-07-11 The United States Of America As Represented By The Secretary Of The Navy Discrete chirp frequency synthesizer
US4131484A (en) * 1978-02-13 1978-12-26 Western Electric Company, Inc. Frequency adjusting a piezoelectric device by lasering
US4189677A (en) * 1978-03-13 1980-02-19 Purdue Research Foundation Demodulator unit for spread spectrum apparatus utilized in a cellular mobile communication system
US4222115A (en) * 1978-03-13 1980-09-09 Purdue Research Foundation Spread spectrum apparatus for cellular mobile communication systems
US4301530A (en) * 1978-12-18 1981-11-17 The United States Of America As Represented By The Secretary Of The Army Orthogonal spread spectrum time division multiple accessing mobile subscriber access system
CH630747A5 (en) * 1979-01-18 1982-06-30 Ebauches Sa METHOD FOR ADJUSTING THE FREQUENCY OF A RESONATOR AND RESONATOR WITH ADJUSTED FREQUENCY OBTAINED BY THE IMPLEMENTATION OF THIS PROCESS.
JPS55157321U (en) * 1979-04-02 1980-11-12
CH626479A5 (en) * 1979-07-05 1981-11-13 Suisse Horlogerie
US4338492A (en) * 1980-01-02 1982-07-06 Zenith Radio Corporation Television receiver with two-way telephone conversation capability
US4355411A (en) * 1980-03-24 1982-10-19 Bell Telephone Laboratories, Incorporated Technique for efficient spectrum utilization in mobile radio systems using space diversity
US4455651A (en) * 1980-10-20 1984-06-19 Equatorial Communications Company Satellite communications system and apparatus
US4418393A (en) * 1980-10-27 1983-11-29 Sperry Corporation Matched filter spread spectrum code recovery apparatus
US4418425A (en) * 1981-08-31 1983-11-29 Ibm Corporation Encryption using destination addresses in a TDMA satellite communications network
US4425661A (en) * 1981-09-03 1984-01-10 Applied Spectrum Technologies, Inc. Data under voice communications system
GB2109197B (en) * 1981-10-13 1985-12-04 Standard Telephones Cables Ltd Radio system
US4432089A (en) * 1981-12-24 1984-02-14 Motorola, Inc. Digital loop transceiver for interfacing a digital PABX to a digital subscriber set via a subscriber line
US4425642A (en) * 1982-01-08 1984-01-10 Applied Spectrum Technologies, Inc. Simultaneous transmission of two information signals within a band-limited communications channel
ATE36923T1 (en) * 1982-03-10 1988-09-15 Emi Ltd COMMUNICATION THROUGH NOISY LINES.
US4479226A (en) * 1982-03-29 1984-10-23 At&T Bell Laboratories Frequency-hopped single sideband mobile radio system
US4456793A (en) * 1982-06-09 1984-06-26 Bell Telephone Laboratories, Incorporated Cordless telephone system
CA1191905A (en) * 1982-06-30 1985-08-13 Canadian Patents And Development Limited/Societe Canadienne Des Brevets Et D'exploitation Limitee Spread spectrum modem
US4563774A (en) * 1982-10-25 1986-01-07 At&T Bell Laboratories Address coded communication system
US4484028A (en) * 1982-11-01 1984-11-20 Motorola, Inc. Digital loop transceiver having a power up/down circuit
DE3302828A1 (en) * 1983-01-28 1984-08-02 Standard Elektrik Lorenz Ag, 7000 Stuttgart RECEIVER
US4787093A (en) * 1983-03-21 1988-11-22 Develco, Inc. Combinatorial coded telemetry
US4550414A (en) * 1983-04-12 1985-10-29 Charles Stark Draper Laboratory, Inc. Spread spectrum adaptive code tracker
US4524461A (en) * 1983-07-18 1985-06-18 American Transceiver Corp. Helmet-supported radio transceiver and broadcast receiver system
FR2549663A1 (en) * 1983-07-21 1985-01-25 Snecma METHOD AND DEVICE FOR ENCODING AND DECODING BROADBAND TRANSMISSION
GB2144310A (en) * 1983-08-01 1985-02-27 Philips Electronic Associated Multiple-access communications system
US4649549A (en) * 1983-08-30 1987-03-10 Sophisticated Signals And Circuits Apparatus for synchronizing linear PN sequences
US4707839A (en) * 1983-09-26 1987-11-17 Harris Corporation Spread spectrum correlator for recovering CCSK data from a PN spread MSK waveform
JPS60103834A (en) * 1983-11-11 1985-06-08 Nippo Tsushin Kogyo Kk Individual call communication system
US4660164A (en) * 1983-12-05 1987-04-21 The United States Of America As Represented By The Secretary Of The Navy Multiplexed digital correlator
US5303286A (en) 1991-03-29 1994-04-12 Space Systems/Loral, Inc. Wireless telephone/satellite roaming system
US4642505A (en) * 1984-03-05 1987-02-10 Motorola, Inc. Laser trimming monolithic crystal filters to frequency
US4567588A (en) * 1984-03-23 1986-01-28 Sangamo Weston, Inc. Synchronization system for use in direct sequence spread spectrum signal receiver
US4601047A (en) * 1984-03-23 1986-07-15 Sangamo Weston, Inc. Code division multiplexer using direct sequence spread spectrum signal processing
US4561089A (en) * 1984-03-23 1985-12-24 Sangamo Weston, Inc. Correlation detectors for use in direct sequence spread spectrum signal receiver
DE3411014A1 (en) 1984-03-24 1985-09-26 Standard Elektrik Lorenz Ag, 7000 Stuttgart MESSAGE TRANSFER SYSTEM
JPS60220635A (en) * 1984-04-17 1985-11-05 Clarion Co Ltd Spread spectrum transmitter and receiver
US4569062A (en) * 1984-06-28 1986-02-04 Dellande Brian W Interface circuit for interfacing between asynchronous data in start/stop format and synchronous data
GB2166616B (en) * 1984-09-21 1989-07-19 Clarion Co Ltd Surface acoustic wave device
US4621365A (en) * 1984-11-16 1986-11-04 Hughes Aircraft Company Synchronization preamble correlation detector and frequency estimator
US4641317A (en) * 1984-12-03 1987-02-03 Charles A. Phillips Spread spectrum radio transmission system
US4813057A (en) * 1984-12-03 1989-03-14 Charles A. Phillips Time domain radio transmission system
FR2575624A1 (en) 1984-12-28 1986-07-04 Mouly Michel LOW FREQUENCY RADIOCOMMUNICATION SYSTEM WITH A MIXED SEQUENCE ALLOCATION PROTOCOL
US4622854A (en) * 1984-12-31 1986-11-18 Schlumberger Technology Corporation Rounded wall surface acoustic wave sensors
GB2171576B (en) * 1985-02-04 1989-07-12 Mitel Telecom Ltd Spread spectrum leaky feeder communication system
US4675863A (en) 1985-03-20 1987-06-23 International Mobile Machines Corp. Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
DE3511430A1 (en) * 1985-03-29 1986-10-02 Philips Patentverwaltung Gmbh, 2000 Hamburg METHOD FOR SYNCHRONIZING THE RECEIVING DEVICES IN A DIGITAL MULTIPLEX TRANSMISSION SYSTEM
EP0204325B1 (en) * 1985-06-05 1990-11-28 Nec Corporation Time division switching system having a priority selector responsive to proceed-to-send requests
US4630283A (en) * 1985-07-17 1986-12-16 Rca Corporation Fast acquisition burst mode spread spectrum communications system with pilot carrier
US4742512A (en) * 1985-07-19 1988-05-03 Nec Corporation Multipoint communication system having polling and reservation schemes
AU593564B2 (en) * 1985-07-24 1990-02-15 Nec Corporation Spread spectrum power line communications
DE3527330A1 (en) * 1985-07-31 1987-02-05 Philips Patentverwaltung DIGITAL RADIO TRANSMISSION SYSTEM WITH CONNECTING ORGANIZATION CHANNEL IN THE TIME MULTIPLEX FRAME
US4918689A (en) * 1985-10-10 1990-04-17 Bell Communications Research, Inc. Asynchronous communication system
US4672254A (en) * 1985-10-11 1987-06-09 Massachusetts Institute Of Technology Surface acoustic wave devices and method of manufacture thereof
US4672658A (en) * 1985-10-16 1987-06-09 At&T Company And At&T Bell Laboratories Spread spectrum wireless PBX
KR870004587A (en) 1985-10-16 1987-05-11 엘리 와이스 Wireless local area network
US4701904A (en) * 1985-10-18 1987-10-20 American Telephone And Telegraph Company, At&T Bell Laboratories Optical local area network employing microwave modulation techniques
US4647863A (en) * 1985-11-01 1987-03-03 The United States Of America As Represented By The Secretary Of The Army Saw transition detector for PSK signals
US4724435A (en) * 1985-11-06 1988-02-09 Applied Spectrum Technologies, Inc. Bi-directional data telemetry system
US4718080A (en) * 1985-12-16 1988-01-05 Serrano Arthur L Microprocessor controlled interface for cellular system
US4736371A (en) * 1985-12-30 1988-04-05 Nec Corporation Satellite communications system with random multiple access and time slot reservation
US4703474A (en) * 1986-02-28 1987-10-27 American Telephone And Telegraph Company, At&T Bell Laboratories Spread spectrum code-division-multiple-access (SS-CDMA) lightwave communication system
DE3607687A1 (en) * 1986-03-08 1987-09-10 Philips Patentverwaltung METHOD AND CIRCUIT ARRANGEMENT FOR SWITCHING A RADIO CONNECTION INTO ANOTHER RADIO CELL OF A DIGITAL RADIO TRANSMISSION SYSTEM
US4815106A (en) * 1986-04-16 1989-03-21 Adaptive Networks, Inc. Power line communication apparatus
US4807222A (en) * 1986-08-25 1989-02-21 American Telephone And Telegraph Company At&T Bell Laboratories Cordless accessed high-speed high-capacity local area networks
JPS6374330A (en) * 1986-09-18 1988-04-04 Sony Corp Radio communication method and communication equipment therefor
JPS6397033A (en) * 1986-10-14 1988-04-27 Kenwood Corp Synchronizing pulse generation circuit for spread spectrum communication system
US4754473A (en) * 1986-10-16 1988-06-28 Willie Edwards Remote telephonic data transcribing system
US4901307A (en) * 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
US4804938A (en) * 1986-10-24 1989-02-14 Sangamo Weston, Inc. Distribution energy management system
US4759078A (en) * 1986-11-14 1988-07-19 Rose Communication Systems, Inc. Coordinated local oscillator receiving system
US4759034A (en) * 1986-12-02 1988-07-19 General Research Of Electronics, Inc. Multi-step spread spectrum communication apparatus
US4797947A (en) * 1987-05-01 1989-01-10 Motorola, Inc. Microcellular communications system using macrodiversity
JP2582369B2 (en) * 1987-05-13 1997-02-19 日本電気株式会社 Roaming registration / cancellation method
US4799253A (en) * 1987-07-20 1989-01-17 Motorola, Inc. Colocated cellular radiotelephone systems
CA1293999C (en) * 1987-08-24 1992-01-07 Osamu Ichiyoshi Earth station capable of effectively using a frequency band of asatellite
US4894842A (en) * 1987-10-15 1990-01-16 The Charles Stark Draper Laboratory, Inc. Precorrelation digital spread spectrum receiver
US4800885A (en) * 1987-12-02 1989-01-31 The Boc Group, Inc. Blood constituent monitoring apparatus and methods with frequency division multiplexing
US4878238A (en) * 1987-12-23 1989-10-31 Rash Mark S Cordless telephone network
US4811357A (en) * 1988-01-04 1989-03-07 Paradyne Corporation Secondary channel for digital modems using spread spectrum subliminal induced modulation
CA1318368C (en) * 1988-01-14 1993-05-25 Yoshitaka Uchida Correlation pulse generator
US4805208A (en) * 1988-01-15 1989-02-14 Niravoice, Inc. Modem compression system for telephone network
US4979170A (en) * 1988-01-19 1990-12-18 Qualcomm, Inc. Alternating sequential half duplex communication system
US4928274A (en) * 1988-01-19 1990-05-22 Qualcomm, Inc. Multiplexed address control in a TDM communication system
JP2548763B2 (en) 1988-01-25 1996-10-30 富士通株式会社 Mobile communication zone switching method and control switching center
GB2220824A (en) 1988-07-13 1990-01-17 Philips Electronic Associated Transmission system for sending two signals simultaneously on the same communications channel
GB2222505B (en) * 1988-09-02 1993-06-16 Plessey Co Plc A method of establishing a radio link in one of a plurality of channels between two radio units
CH676179A5 (en) * 1988-09-29 1990-12-14 Ascom Zelcom Ag
JP2718978B2 (en) 1989-03-02 1998-02-25 株式会社トキメック Data transmission method
US4943973A (en) * 1989-03-31 1990-07-24 At&T Company Spread-spectrum identification signal for communications system
US5022046A (en) 1989-04-14 1991-06-04 The United States Of America As Represented By The Secretary Of The Air Force Narrowband/wideband packet data communication system
US5042082A (en) 1989-06-26 1991-08-20 Telefonaktiebolaget L. M. Ericsson Mobile assisted handoff
GB2232555A (en) 1989-05-26 1990-12-12 Philips Electronic Associated Digital cordless telephone systems
GB2232562A (en) 1989-05-26 1990-12-12 Philips Electronic Associated Data transmission over a tdm duplex channel
US5008953A (en) * 1989-06-26 1991-04-16 Telefonaktiebolaget L M Ericsson Mobile station link supervision utilizing digital voice color codes
US5016255A (en) * 1989-08-07 1991-05-14 Omnipoint Data Company, Incorporated Asymmetric spread spectrum correlator
US5022047A (en) 1989-08-07 1991-06-04 Omnipoint Data Corporation Spread spectrum correlator
US5101501A (en) 1989-11-07 1992-03-31 Qualcomm Incorporated Method and system for providing a soft handoff in communications in a cdma cellular telephone system
US5056109A (en) 1989-11-07 1991-10-08 Qualcomm, Inc. Method and apparatus for controlling transmission power in a cdma cellular mobile telephone system
US5109390A (en) 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver in a cdma cellular telephone system
CA2032909C (en) 1989-12-22 1995-10-10 Kaoru Endo Csk communication system
US5058138A (en) 1990-01-16 1991-10-15 Pacesetter Electronics, Inc. Modular receiver for signals having multiple channels and multiple formats
US5029184A (en) 1990-01-24 1991-07-02 Harris Corporation Low probability of intercept communication system
US5025452A (en) 1990-03-20 1991-06-18 Andrew Corporation Full-duplex, sub-band spread spectrum communications system
US5018165A (en) 1990-03-21 1991-05-21 Andrew Corporation Communication system using spread spectrum and leaky transmission line
US5157686A (en) 1990-05-24 1992-10-20 Cylink Corporation Method and apparatus for the modulation of spread spectrum radio signals
US5253268A (en) 1990-05-24 1993-10-12 Cylink Corporation Method and apparatus for the correlation of sample bits of spread spectrum radio signals
US5166952A (en) 1990-05-24 1992-11-24 Cylink Corporation Method and apparatus for the reception and demodulation of spread spectrum radio signals
US5291515A (en) 1990-06-14 1994-03-01 Clarion Co., Ltd. Spread spectrum communication device
US5081642A (en) 1990-08-06 1992-01-14 Omnipoint Data Company, Incorporated Reciprocal saw correlator method and apparatus
WO1992007434A1 (en) 1990-10-23 1992-04-30 Omnipoint Corporation Method and apparatus for establishing spread spectrum communications
US5303393A (en) 1990-11-06 1994-04-12 Radio Satellite Corporation Integrated radio satellite response system and method
US5218618A (en) 1990-11-07 1993-06-08 Hughes Aircraft Company Cellular telephone service using spread spectrum transmission
US5239671A (en) 1990-11-13 1993-08-24 Pagemart, Inc. Simulcast satellite paging system with provision for signal interruption
US5224120A (en) 1990-12-05 1993-06-29 Interdigital Technology Corporation Dynamic capacity allocation CDMA spread spectrum communications
US5351269A (en) 1990-12-05 1994-09-27 Scs Mobilecom, Inc. Overlaying spread spectrum CDMA personal communications system
US5228056A (en) 1990-12-14 1993-07-13 Interdigital Technology Corporation Synchronous spread-spectrum communications system and method
US5185762A (en) 1991-05-15 1993-02-09 Scs Mobilecom, Inc. Spread spectrum microwave overlay with notch filter
US5263045A (en) 1990-12-05 1993-11-16 Interdigital Technology Corporation Spread spectrum conference call system and method
US5274665A (en) 1990-12-14 1993-12-28 Interdigital Technology Corporation Polyopoly overlapping spread spectrum communication system and method
US5193101A (en) 1991-02-04 1993-03-09 Motorola, Inc. On-site system frequency sharing with trunking systems using spread spectrum
US5402413A (en) 1991-04-08 1995-03-28 Omnipoint Corporation Three-cell wireless communication system
AU2140092A (en) 1991-05-13 1992-12-30 Omnipoint Corporation Dual mode transmitter and receiver
US5228053A (en) 1991-05-15 1993-07-13 Interdigital Technology Corporation Spread spectrum cellular overlay CDMA communications system
US5289497A (en) 1991-05-23 1994-02-22 Interdigital Technology Corporation Broadcast synchronized communication system
US5177765A (en) 1991-06-03 1993-01-05 Spectralink Corporation Direct-sequence spread-spectrum digital signal acquisition and tracking system and method therefor
US5285469A (en) 1991-06-03 1994-02-08 Omnipoint Data Corporation Spread spectrum wireless telephone system
US5177766A (en) 1991-06-03 1993-01-05 Spectralink Corporation Digital clock timing generation in a spread-spectrum digital communication system
US5195091A (en) 1991-07-09 1993-03-16 At&T Bell Laboratories Adaptive synchronization arrangement
US5195090A (en) 1991-07-09 1993-03-16 At&T Bell Laboratories Wireless access telephone-to-telephone network interface architecture
US5153598A (en) 1991-09-26 1992-10-06 Alves Jr Daniel F Global Positioning System telecommand link
US5319634A (en) 1991-10-07 1994-06-07 Phoenix Corporation Multiple access telephone extension systems and methods
JP2554219B2 (en) 1991-11-26 1996-11-13 日本電信電話株式会社 Digital signal superposition transmission method
US5515378A (en) 1991-12-12 1996-05-07 Arraycomm, Inc. Spatial division multiple access wireless communication systems
EP0617864B1 (en) 1991-12-16 2002-02-27 XIRCOM Wireless, Inc. Spread-spectrum data publishing system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4837786A (en) * 1986-08-07 1989-06-06 Comstream Corporation Technique for mitigating rain fading in a satellite communications system using quadrature phase shift keying
US5073900A (en) * 1990-03-19 1991-12-17 Mallinckrodt Albert J Integrated cellular communications system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970703660A (en) * 1994-07-23 1997-07-03 랄프 홀거 베렌스; 게오르그 뮐러 Single point: multi-points radio link system
US8315659B2 (en) 1997-08-15 2012-11-20 Qualcomm Incorporated Method and apparatus for providing broadcast messages in a communications network

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